ImmutableLongArray trimmed = iia.trimmed();
    assertThat(trimmed).isNotSameInstanceAs(iia);

    // Yes, this is apparently how you check array equality in Truth
    assertThat(trimmed.toArray()).isEqualTo(iia.toArray());
  }

  private static void assertDoesntActuallyTrim(ImmutableLongArray iia) {
    assertThat(iia.trimmed()).isSameInstanceAs(iia);
  }

  @J2ktIncompatible

    ImmutableDoubleArray trimmed = iia.trimmed();
    assertThat(trimmed).isNotSameInstanceAs(iia);

    // Yes, this is apparently how you check array equality in Truth
    assertThat(trimmed.toArray()).isEqualTo(iia.toArray());
  }

  private static void assertDoesntActuallyTrim(ImmutableDoubleArray iia) {
    assertThat(iia.trimmed()).isSameInstanceAs(iia);
  }

  @J2ktIncompatible

   */
  private static TestCase generateGuardWithWrongMonitorTestCase(
      final Method method, final boolean fair1, final boolean fair2) {
    final boolean timed = isTimed(method); // Not going to bother with all timeouts, just 0ms.
    return new TestCase(method.getName() + (timed ? "(0ms)" : "()") + "/WrongMonitor->IMSE") {
      @Override
      protected void runTest() throws Throwable {
        Monitor monitor1 = new Monitor(fair1);

        new Supplier<Boolean>() {
          boolean isWaiting(Thread thread) {
            switch (thread.getState()) {
              case BLOCKED:
              case WAITING:
              case TIMED_WAITING:
                return true;
              default:
                return false;
            }
          }

          int waitingThreads() {
            int waitingThreads = 0;

        new Supplier<Boolean>() {
          boolean isWaiting(Thread thread) {
            switch (thread.getState()) {
              case BLOCKED:
              case WAITING:
              case TIMED_WAITING:
                return true;
              default:
                return false;
            }
          }

          int waitingThreads() {
            int waitingThreads = 0;

    // The task thread waits for the latch, so we expect a timeout here.
    try {
      future.get(20, MILLISECONDS);
      fail("Should have timed out trying to get the value.");
    } catch (TimeoutException expected) {
    } finally {
      latch.countDown();
    }
  }

  /**
   * Tests that a canceled future throws a cancellation exception.
   *

  @GwtIncompatible
  @ParametricNullness
  static <T extends @Nullable Object> T invokeAnyImpl(
      ListeningExecutorService executorService,
      Collection<? extends Callable<T>> tasks,
      boolean timed,
      long timeout,
      TimeUnit unit)
      throws InterruptedException, ExecutionException, TimeoutException {
    checkNotNull(executorService);
    checkNotNull(unit);
    int ntasks = tasks.size();

      } else {
        try {
          ScheduledFuture<?> timer = timeoutFuture.timer;
          timeoutFuture.timer = null; // Don't include already elapsed delay in delegate.toString()
          String message = "Timed out";
          // This try-finally block ensures that we complete the timeout future, even if attempting
          // to produce the message throws (probably StackOverflowError from delegate.toString())
          try {

                getChecked(
                    FAILED_FUTURE_CHECKED_EXCEPTION, ExceptionWithGoodAndBadConstructor.class));
    assertThat(expected).hasCauseThat().isSameInstanceAs(CHECKED_EXCEPTION);
  }

  // Boring timed-get tests:

  public void testGetCheckedTimed_success() throws TwoArgConstructorException {
    assertEquals(
        "foo", getChecked(immediateFuture("foo"), TwoArgConstructorException.class, 0, SECONDS));
  }

   * </ul>
   *
   * @throws ExecutionException if the computation threw an exception
   * @throws CancellationException if the computation was cancelled
   * @throws TimeoutException if the wait timed out
   */
  @CanIgnoreReturnValue
  @J2ktIncompatible
  @GwtIncompatible // TODO
  @SuppressWarnings("GoodTime") // should accept a java.time.Duration
  @ParametricNullness